Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 1
Written by Mirela PARASCHIVU, Andi CIOBANU, Otilia COTUNA, Marius PARASCHIVU
Proven to be the first pathogenic bacterium of plants, Erwinia amylovora causes Fire Blight which is nowadays one of the most devastating disease of apples and pears in many parts of the world, especially in temperate ones. The current paper assessed in natural conditions of infection in 2016 year, the impact of fire blight on four pear genotypes (cv. Napoca, Red Bartlett, Beurre Bosc, Curè) within a plantation located in the proximity of Craiova city, using Area under the Disease Progress Curve (AUDPC) and the impact of pathogen attack on fruits yield and sugars content. The response of tested pear genotypes to the fire blight attack ranged on a large scale of variability depending on the genotype resistance or sensitivity to disease and environmental conditions. The most susceptible pear variety to fire blight was Curè, which also proved the lowest yielding capacity and sugar content in fruits under fire blight impact. AUDPC values ranged from 164 to 376 with unfavorable impact on fruits yield and sugar content (R2 = 0.9799; R2 = 0.9557).
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